Another approach to preserve the fully functional api is decorators.

I have a solution to write a single code path for both async and sync

https://news.ycombinator.com/item?id=43982570

    @property
    def is_spam(self) -> bool:
       return self._comment_check in {"true", "blatant"}

    @property
    def is_blatant_spam(self) -> bool:
       return self._comment_check == "blatant"